Method and apparatus for image processing

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(11)

EP 1 291 822 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	31.03.2004 Bulletin 2004/14

(43)	Date of publication A2:
	12.03.2003 Bulletin 2003/11

(21)	Application number: 02256094.0

(22)	Date of filing: 03.09.2002

(51)	International Patent Classification (IPC)⁷: G06T 11/00, H04N 1/60

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

07.09.2001 JP 2001271818
22.07.2002 JP 2002212615

(71)	Applicant: CANON KABUSHIKI KAISHA
	Tokyo (JP)

(72)	Inventors:
	Yamada, Osamu, c/o Canon Kabushiki Kaisha Tokyo (JP) Torigoe, Makoto, c/o Canon Kabushiki Kaisha Tokyo (JP) Akiyama, Yuji, c/o Canon Kabushiki Kaisha Tokyo (JP) Shimada, Takuya, c/o Canon Kabushiki Kaisha Tokyo (JP)

(74)	Representative: Beresford, Keith Denis Lewis et al
	BERESFORD & Co. 16 High Holborn London WC1V 6BX London WC1V 6BX (GB)

(54)	Method and apparatus for image processing

(57) Image data of a color patch is created using a printer profile according to a color conversion method and the image output apparatus 3 prints and outputs the color patch on a storage medium using the image data of this color patch. The color of each color patch recorded on the above-described storage medium is measured using the colorimeter 20, and the matching accuracy calculation section 8 calculates the accuracy (CRI) of color matching using the measurement data of the measurement result. The matching accuracy decision section 9 compares the CRI and a preset threshold TH, decides the quality of the accuracy of color matching and notifies the decision result.

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